Swiss cheese is a generic name in North America for several related varieties of cheese, mainly of North American manufacture, which resemble Emmental cheese, a yellow, medium-hard cheese that originated in the area around Emmental, in Switzerland. Some types of Swiss cheese have a distinctive appearance, as the blocks of the cheese are riddled with holes known as “eyes”. Swiss cheese without eyes is known as “blind”.
Switzerland is home to about 450 varieties of cheese. Cow’s milk is used in about 99 percent of the cheeses produced. The remaining share is made up of sheep milk and goat milk.
Source: https://en.wikipedia.org/wiki/Swiss_cheese, https://en.wikipedia.org/wiki/List_of_Swiss_cheeses